Green anthracene dyes and process of making the same.



a soluble in alkaline HUGO WOLFE, 0F LUDWIGSITAFEN-ON-THE -RHINE, GERMANY, ASSIGNOE TO BADISCHE ANILIN & SODA FABRIK, OF LUTDWIGSHAFEN-ON-THE-RHINE, GERMANY, A COR- PORATION.

GREEN ANTHRA CENE DYES AND PROCESS OF MAKING THE SAME.

No Drawing.

Specification of Letters Patent. Application filed August 14. 1909.

l atented June 29,1911. Serial No. 512.848.

To all whom it may concern:

Be it known that I, I-Ineo lVoLFi", doctor of philosophy and chemist, a subject of the Grand Duke of Baden, residing at Ludwigshafen-on-the-Rhine, Germany, have i11- vented new and useful Improven'ients in Green Anthracene Dyes and- Processes of ll'la-king the Same, of which the following is a specification.

I have discovered that thebenzanthronyl- 1-amino-anthraquinon bodies which can be obtained by condensing l-amino-anthraquinon compounds with halogenated benzanthron compounds which contain the halogen in the benzanthron ring, can be transformed, by treatment with condensing agents, into coloring matters which dye, from the vat, fast shades on vegetable fiber.

My new coloring matters possess the folowing generic properties. They are insoluble in water, but are soluble in nitrobenzone and in quinolin yielding greenish solutions, they are also soluble in concentrated sulfuric acid yielding from green to red solutions. In the solid state they possess from green to greenish black color. They are hydrosulfite yielding from blue, to violet-blue, vats, and these vats color cotton from blue, to violet-blue, shades, which shades on washing and drying become from green to bluish green.

he coloring matter which I wish to be understood as claiming specifically is that obtainable from benzanthronyl-l-amino-anthraqu-inon itself, and it yields a green solution in nit-robenzene, in quinolin and in concentrated sulfuric acid. It. can be obtained in the form of a green-black powder, and yields a blue-violet vat in alkaline .hydrosulfite. This vat colors cotton blue-violet shades, which shades on washing and rying are converted in a very fast green.

' The following are examples of how my invention can be performed, but the invention is not confined to these examples. The parts are by weight, and the temperatures are given in degrees centigrade. The benzan'thronyl-1-amino-anthraquinon named in Examples 1, 2, and 3, is obtainable by conidensing l-aminoanthraquinon with monochlorbenzanthron which has been produced by acting with chlorin onv benzan- -metallic sodium,

thron in aqueous suspension, as described ring, hundred and forty, to two hundred and British temperature for about fifteen minutes. When the melt is cold, boil it with water and precipitate the coloring matter from the solution by passing air through it. Filter off the coloring matter, which is a dark green paste. If this paste be dried, the coloring matter is obtained as a green-black powder which is practically insoluble in either water, alkalis, dilute acids, glacial acetic acid, or alcohol. It yields a green solution in either xylene, nitrohenzene', or quinolin, and, on recrystallization from nitrobenzone, can be obtained in the form .of small leaflets which yield a pure green-solution in concentrated sulfuric acid. The coloring matter dissolves i f()1l\'-fi\0, de rees and IllillIltELiIl at this h 7 in alkaline hydrosulfite,

yielding a blue-violet vat which colors vegetable fiber violet-blue, which shade, however, on washing and drying, is converted into a very fast green. Example 2: Dissolve one hundredparts of potassium hydrate in eighty parts of absolute alcohol and, at a temperature of from one hundred and thirty, to one hundred and forty, degrees, add ten parts of benzanthronyl 1 amino-anthraquinon and heat the mixture for thirty minutes to from one hundred and fifty-five, to one hundred and sixty, degrees. If, when the melt is cold, it be treated in the manner described in the preceding Example 1, a similar prodnot is obtained.

Example 3: Heat together, at about one hundred and thirty degrees, four parts of twenty parts of absolute alcohol and two hundred parts of anhydrous anilin,"unt il the sodium is completely convertedinto its alcoholate. Then add two parts of benzanthronyl-l-amino-anthraquinon, and boil the whole-for thirty minutes. When the mixture is cold', filter off the coloring matter obtained and wash and dry it. Example 4: Treat benzanthronyl-l-amin i 7-hydroxy-anthraquinon (obtainable from -1-amino-7-hydroxy anthraquinon and the brom-benzanthron produced by. 'acting with bromin on benzanthron in aqueous suspension) with alcoholic potash in the manner described in the preceding second example, until the formation of the colorin matteris complete. When the melt is col boil it with water and precipitate the C010 I g matter by passin air through the sol ion. On filtering oif t e. coloring matter, ashing it, 7 and then boiling it with dilute drochloric acid, the coloring matter is obtained in the zene and quinolin,

red. Upon adding boric acid to tion and heating it, the color becomes: brown-violet.

The coloring matter yields a blue-violetvat with alkaline hydrosulfite.

Such a vat colors vegetable fiber violet-blue shades which, upon washing and drying, be-

come bluish green.

Now what I claim is 1. The process of producmg coloring mat ter of the anthracene series by treating a benzanthronyl-1-amino anthraquinon body with a condensing agent.

2. The process of producing coloring matter of the anthracene series by treating concentrated sulfuric acid benz anthronyl-l-amino anthraquinon with v caustic potash.

3. As new articles of manufacture the coloring matters of the anthracene series which can be obtained by treating a benzanthr'onyll-amino-anthraquinon body with a condensing agent which coloring matters are insoluble in water, but are soluble in nitrobenzene and in quinolin yielding greenish solutions, are also soluble in concentrated sulfuric acid yielding from green to red solutions, in the solid state possess from green to greenish black color, are soluble in alkaline hydrosulfite yielding from blue to violet-blue vats, and which vats color cotton from blue to Violet-blue shades, whichshades on washing and-drying become from green to bluish green.

4. As anew article .of manufacture the coloring matter of the anthracene series which can be obtained by treating benzanthronyl-l-amino-anthraquinon with caustic potash, which coloring'matter' is insoluble in water, but yields a green solution in nitrobenzene, m qumolin and in concentrated sulfuric acid, which can be obtained in the forin of'a green-black powder, and yields a blue-violet vat in alkaline hydrosulfite, which vat colors cotton blue-violet r shades, which shades on washing and drying are converted into a very fast green. v In testimony whereof I have hereunto set m' hand in the presence of two subscribing witnesses. HUGO WOLFF.

Witnesses:

'J. ALEO. LLOYD, J

Ems'r L. Ives. 

